Fairfield police launched a homicide investigation Friday morning after the naked body of a missing Suisun City girl was discovered in Allan Witt Park, officials said.

The body of the teen, who authorities are not identifying pending notification of next of kin, was found around 6:45 a.m. near a gazebo in the park after an officer performing a security check was flagged down by a citizen who spotted what they believed may have been a body, said Fairfield police Officer Cleo Mayoral.

According to Mayoral, since the news of the discovery broke, "There has been a lot of speculation" as to who the victim was and police were inundated with calls from concerned parents and family members.

During the course of their investigation, police learned that the victim was the same teen who had been reported missing by her legal guardian a day earlier when she failed to come home from school, said Suisun City police Cmdr. Tim Mattos.

According to Mattos, a missing person report was filed around 5:44 p.m. Officers "followed leads throughout the night," Mattos said, but the trail of their investigation grew cold and eventually stalled around midnight.

It was resumed Friday morning around 6:45 a.m. -- almost the exact time the victim's body was discovered, Mattos said.

"An officer was on the phone with the reporting party when we received the call from Fairfield police," he noted.

Police described the victim as a white female in her early teens, but are not releasing any further information, including her age or the school she attended.

They were, however, able to confirm her as the missing teen, Mattos said.

Mayoral stated that the victim's body did not have any significant signs of trauma. However, an autopsy that was performed Friday afternoon elevated the case from "suspicious" in nature to a full-scale homicide investigation.

The cause of death has not been released and Mayoral said it is unknown whether the victim was killed in the park or transported there after her death.

Portions of the park, which Mayoral said is "very large," were closed off as officers continued their investigation, but the scene was opened later Friday evening.

Though Mattos said the victim did not have any prior history of running away with Suisun City police, he would not comment on whether other law enforcement agencies had had any dealings with her.

"This is in the very early stages of a homicide investigation," Mattos said, noting that authorities will be unable to release much information for fear of compromising the case.